The colour of the solution/precipitate obtained in the elemental analysis of an organic compound and the molecule/ion responsible for the colour are given below. Choose the incorrectly matched pair:A. Prussian blue - `Fe_(4)[Fe(CN)_(6)]_(3).xH_(2)O`B. Black - PbSC. Violet colour - `[Fe(CN)_(5)NOS]^(4-)`D. Yellow - `(NH_(4))_(2)MoO_(4)`

The colour of the solution/precipitate obtained in the elemental analy

1.	The colour of the solution/precipitate obtained in the elemental analysis of an organic compound and the molecule/ion responsible for the colour are given below. Choose the incorrectly matched pair:A. Prussian blue - `Fe_(4)[Fe(CN)_(6)]_(3).xH_(2)O`B. Black - PbSC. Violet colour - `[Fe(CN)_(5)NOS]^(4-)`D. Yellow - `(NH_(4))_(2)MoO_(4)`
Answer» Correct Answer - D During the detection of P, the yellow ppt. obtained are due to `(NH_(4))_(3)PO_(4).12 MoO_(3)` (amm. Phosphomolybdate) and not due to `(NH_(4))_(2)MoO_(4)` (ammonium molybdate). Thus, option (e) is incorrect.

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